KX-TC1245RUB - Panasonic Telephone Service Manual (repair manual). Page 78

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28 SCHEMATIC DIAGRAM (BASE UNIT)
STB03
STB02
STB01
STB00
STB3
STB2
STB1
STB0
1
2
RPT
1
2
RD_P
1
J100P
C340
1
J100P
C339
1
J100P
C338
1
J100P
C341
1
2
8
1
2
5
1
2
2
1
2
SKIP
1
2
GREC
1
2
ERASE
1
2
GCHECK
1
2
7
1
2
4
1
2
1
1
2
6
1
2
9
1
2
3
KEYIN2
KEYIN1
1
2
ANSWER
1
2
TONE
1
2
LOCATOR
KEYIN3
KEYIN4
1
2
VOL_DOWN
1
2
0
1
2
#
1
2
VOL_UP
KIN3
KIN4
IO00
IO01
IO02
IO03
IO04
1
J100P
C331
KIN1
KIN2
WP1
IO05
IO06
IO07
1
J100P
C333
1
J100P
C332
1
LED304
1
2
FLASH
1
2
NEW_MSG
STB4
STB5
KEYIN0
KIN0
STB04
STB05
1
J100P
C337
1
J100P
C336
1
J100P
C335
1
J100P
C334
IO7
IO6
IO5
IO4
IO07
IO06
IO05
IO04
1
2
AUTO_PROG
1
2
STOP
1
Z0.1
C329
16
NC
17
NC
22
GND
11
12
13
NC
14
NC
15
NC
18
I/O
0
19
I/O
1
20
I/O
2
21
I/O
3
1
GND
2
CLE
3
ALE
4
WE
5
WP
6
NC
7
NC
8
NC
9
NC
10
NC
36
N
C
35
N
C
43
C
E
42
R
E
41
R/B
40
GND
39
N
C
38
N
C
37
N
C
44
VDD
34
33
32
N
C
31
N
C
30
N
C
28
N
C
29
N
C
23
VDD
24
I/O
4
25
I/O
5
26
I/O
6
27
I/O
7
IC304
IO01
IO02
IO03
IO1
IO2
IO3
IO00
IO0
FGND
ALE
WP
WE
CLE
ALE1
CLE1
WE1
WP1
1
C501
NC
1
100K
R334
RESET
1
R501 470K
1
R502 1.0M
1
2
SP
1
2
HOLD_RNG
FVDD
KEYIN5
CE
RE
CE1
KIN5
RE1
RE1
WE1
1
J100P
C330
1
R335
100K
2
3
1
Q302
1
C328 Z0.1
RESET
UTX1
UGND1
UTX
UGND
1
L325
1
L326
1
R327
220
1
R326
220
LINE_SZ
RELAY
1
8
100K
RA303
1
2
3
4
5
6
7
8
9 10 11 12
LCD301
1
NC
R317
TX_PWR_CONT
120K
LEVEL_CONT
SIG_OUT
2
3
1
NC
Q303
4
GND
8
VDD
2
A1
1
A0
3
A2
7
WP
6
SCL
5
SDA
IC303
NC
1
R337 NC
PLL_EN
1
R340
4.7K
PLL_DATA
1
R341
4.7K
PLL_CLOCK
1
R343
0
TX_POWER
1
R342 100K
1
R339
4.7K
1
Z0.1
C326
CAS
1
8
LA
8
4S102
1
8
LA10
4S102
1
8
4S102
LA9
1
Z0.1
C324
KIN2
KIN1
KIN0
KIN3
KIN4
KIN5
STB04
STB05
STB03
STB02
1
L324
0
1
8
LA2 4S102
1
8
4S102
LA3
1
8
4S102
LA4
66
SP-LED
74
GND
75
VDD
73
STB5
72
STB4
71
STB3
70
STB2
69
STB1
68
STB0
76
KEY-IN0
77
KEY-IN1
78
KEY-IN2
79
KEY-IN3
80
KEY-IN4
81
KEY-IN5
82
ANS-LED
83 WP
84 I/O 7
85 I/O 6
86 I/O 5
87 I/O 4
88 I/O 3
89 I/O 2
90 I/O 1
67
CID-LED
1
COM2
2
SEG3
3
SEG4
4
SEG5
5
SEG6
6
SEG7
8
SEG9
7
SEG8
9
SEG10
10
SEG11
11
SEG12
12
VDD
13
GND
15
USE-CONT
91 I/O 0
92 GND
93 VDD
94 RE
95 WE
96 UART-TX
97 TX-DATA
98 LINE SIEZER
99 RLY
100
COM1
14
TX-POWER-CONT
18
NO-USE
17
NO-USE
16
NO-USE
21
PLL-EN
22
PLL-DATA
23
PLL-CLOCK
24
SIG-OUT
25
TX-POWER
27
LEVEL-CONT
28
GND
29
LINE-DTC1
30
LINE-DTC2
31
PA-GND
32
SPP
33
SPN
34
VDDPA
35
CDL-OUT
36
L-OUT
37
A-VDD
38
LINE-IN
39
LGS
40
DC-IN
26
NO-USE
20
(LINE-DC-DTC)
19
CHARGE
41
CID-IN
42
CID-IP
43
CID-O
44
MGS
45
MIN
46
A-GND
47
HM-IN
48
HM-GS
49
VREF
50
GND-PLL
51
VDD-PLL
52
VRTC
53
X-OUT
54
X-IN
55
GND
56
RESET
57
POWER-DOWN
58
CE(FLASH2)
59
RX-DATA
61
ALE(FLASH2)
62
CLE(FLASH2)
63
FLASH2
64
BELL-IN
65
INUSE-LED
60
UART-RX
IC301
1
Z0.1
C325
1
R325
1.2K
1
R322 680
1
680
R323
1
R324
680
RESET
STB01
STB00
1
LED303
1
LED301
1
LED302
1
R321
1.0K
1
R320
NC
1
8
RA301 220
1
L322
1
L321
4.096MHz
X301
1
R315
1.0M
1
C320 J10P
1
C321
J10P
1
Z0.1
C322
CLE1
ALE1
CE1
RST
1
C323
K1000P
1
R316
0
URX
URX1
TXGND
1
C514
K0.01
1
3
2
4
5
6
7
T502
1 OUT
3 VDD
2
GND
4
IN
NC
DUP502
1
K0.01
C518
1
Z0.1
C522
1
NC
C515
1
12K
R511
1
K0.01
C516
2
3
1
Q502
1
R512
10
1
NC
C521
1 OUT
4 GND
3 VDD
6 VDD
5
IN
2
GND
DUP501
RFTX
1
C453
0
+
C456
N
C
1
C457
NC
1
C459
0
1
L402
0
1
R432
68
1
3
2
VR501
NC
1
K0.01
C454
1
C519 K0.01
1
K0.01
C520
2
3
1
Q503
1
R516 120K
1
C455
Z0.1
1
C458
J100P
1
R517
10
1
R515
10K
1
K0.01
C517
2
3
1
Q501
1
D401
1
IN
4
GND
3
VDD
5
GND
6
OUT
2
GND
DUP401
1
R422
6.8K
1
R423
0
1
R424
10K
1
C441
K0.022
1
C440
K4700P
1
3
2
4
5
6
7
T401
1
C432
K0.01
1
NC
C434
1
C436
N
C
1
C437
K0.22
TX_POWER
TX_PWR_CONT
+
50V2.2
C435
+
C433
16V10
1
R508 100
1
R507 100
+
C510 NC
1
K0.01
C513
1
K0.01
C511
1
R509
2.2K
1
J22P
C509
1
R510
NC
1
C512
J47P
1 VDD
2 T-E
3
T-C
4
F out
5
GND
6
OSC
OSC
DRIVE
IC501
1
R504 22K
TXVCO
1
C507
J39P
1
3
2
4
5
6
7
T501
1
C502 K0.1
1
C503 K0.1
1
C505 J680P
1
VD501
1
C508 K0.01
1
J22P
C506
1
R505
47K
1
R506 3.3K
1
C504 K0.022
1
R503 100K
RFRX
RXGND
ANT
ANTENA
1
IN
3
VDD
2
GND
4
OUT
NC
DUP402
1
L403
0
1
R425
10K
1
R431
NC
1
C452
M1000P
1
D403 NC
1
D402 NC
1
L401
1.8uH
RXVCO
1
NC
C444
1
K0.01
C442
1
C443
K0.01
1
R426
NC
1
R427
0
1
3
2
4
5
6
7
T402
NC
455KHZ
1
330
R428
3
1
2
10.7MHz
CF401
1
3
4
5
2
CF402
1
K0.1
C445
1
C447
Z0.1
1
Z0.1
C446
1
NC
R430
1
R429
1.0K
NDTC
IFGND
1
J120P
C401
1
C448
Z0.1
1
C449
J68P
1
K0.1
C450
1
K0.01
C403
+
C451
16V10
1
1K
R402
1
R418
0
PLL_EN
1
C428 NC
1
K0.1
C425
1
NC
C424
1
Z0.1
C422
1
C429
K0.1
56
CLK
51
GND
55
DATA
52
53
54
SIG OUT
49
PLL
50
Fin TX
7
VDD
6
5
4
3
1
EN
2
C
DET
48
47
46
44
45
43
VcapRX
38
GND1
39
40
36
VDD1
37
42 41
26
27
28
25
24
23
E-DET
29
NOISE DTC
31 30
35 34 33 32
11
13
RX
DATA
OUT
12
VDD2
14
GND2
10
8
9
15
19
PE(GND)
20
GND3
17
18
16
22
21
MCU
SPLATTER
FILTER
LD(TX/RX)
14 bit
programmable
counter
ATT(0/2dB)
COMP
SG OUT
LD(TX)
LD(RX)
TX PD
RX PD
1st
MIX
1st LOCAL
OSILLATAR
2nd
MIX
10 bit
programmable
counter
14 bit
programmable
counter
/8
EXPANDER
SQ
5.5V REG
25mA max
+0.5dB
FILTER
FILTER
TO SQ OUT
PRE AMP
SQ
RX-MUTE
ZAP
MIC
MUTE
POWER
DOWN
POWER
DOWN
ZAP
LIMITTER
MIC AMP
LINE AMP
IC401
1
C423
J82P
1
C427
J56P
1
R420
47K
1
C426
K6800P
1
39K
R419
PLL_CLOCK
PLL_DATA
SIG_OUT
1
C439 J18P
1
C438 NC
1
R421
2.2K
1
C431 G27P
SIG_OUT
1
C430 G39P
X401
11.15MHz
1
C413 K4700P
1
Z1.0
C412
1
R411 22K
1
K0.1
C408
1
K0.047
C409
1
C402J120P
1
R404 0
1
R405 33K
1
220K
R401
1
K1000P
C404
DTCOUT
1
NC
C405
1
K0.1
C410
1
22K
R403
1
R406 10K
1
K4700P
C406
1
R407 10K
1
0
R408
1
15K
R409
1
K0.1
C407
LINE_OUT
1
C411
K0.068
1
R410
22
K
1
NC
R433
1
C416
K0.47
1
C414 K680P
1
C418
NC
1
C417
K0.1
1
C421
Z0.1
1
0
R416
1
NC
R415
1
2.2K
R414
1
3
2
20K
VOL402
+
16V47
C420
RX_DATA
1
56K
R417
1
C419
K0.01
1
33K
R413
1
NC
R332
1
6.8K
R412
1
3
2
20K
VOL401
1
C415
K0.47
1
C318
Z0.1
1
Z0.1
C319
1
C309
J330P
1
R311 47K
1
L306
1
L307
1
L308
1
L309
1
Z0.1
C302
1
L304
2KA213
1
L305
0
LINE_DTE1
LINE_DTE2
1
NC
R333
1
NC
C327
!
40MHz
60dBuVemf
1kHz/3kHz MOD
RF-TX MOD
2.3kHz dev
40MHz
RXRF=-46.8dBm
TXRF=2.3dBm
RXRF=-48.2dBm
RXRF=-37.5dBm
RXRF=-41.3dBm
RX RF=-21.1dBm
RXRF=-21.5dBm
RXAF=-15.9dBm
RXAF=-19.1dBm
RXAF=-13.7dBm
RXAF=-15.0dBm
TXAF=-26.3dBm
10.7MHz
30.3MHz
1kHz
TXRF=-11.0dBm
TXRF=7.5dBm
TXRF=6.8dBm
TXRF=-11.6dBm
TXRF=-0.4dBm
TXRF=8.9dBm
1kHz
TXAF=-17.3dBm
1kHz
TX DATA
500Hz/1kHz
4.6V
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(24)
(26)
(27)
(25)
(28)
78
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